Miter-box.



2 SHEETSSHEET 1.

Patented Nov. 3; 1914.

w. E. KAWALLB. MITER BOX. APPLICATION FILED 00115, 1913. 1 1 1 5,832.

Ma i THFNORRIS PETERS COS, PHOTO-LITHQ. WASHINGTON. D C.

WILLIAM E. KAWALLE, or OAKLAND, oALIronNI'AA MI'IER-BOX.

Specification of Letters Patent. Patented N 3 1914.

Application filed October 15, 1913. serial rib.- 795,264.

To all whom it may concern:

Be it known that I, WILLIAM E. KAwALLn, acitizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented new and useful Improvements in Miter BoXes, of

which the following is a specification.

This invention relates to improvements 1n the construction ofmiter-boxes, particularly to the type described and illustrated in myco-pending application, filed October 8, 1912, Serial No. 724,616.

The object of the invention is to provide a simple, reliable, easilyadjusted miter-box which is so constructed that the molding supportingangle-plates will move in unison, one with the other, to the extent ofat least 45 on either side of a straight line.

Another object of the invention is toprovide a locking mechanism wherebythe molding supporting plates may be quickly and simultaneously lockedthe moment the desired cutting angle has been secured.

Another object of the invention is to provide a swivel attachment whichwill permit the miter-box to be turned as a unit into any desiredposition with relation to its supporting base.

Further objects will appear hereinafter. The invention consists of theparts and the construction and combination of parts as hereinafter morefully described and claimed, having reference to the accompanyingdrawings, in which,-

Figure 1 is a planview of a miter-box. Fig. 2 is a perspective view ofone of the turnable guide rings. Fig. 3 is a perspective view of a drum.Fig. 4 is a side view of the miter-box; Fig. 5 is a vertical centralsection through the turning mechanismv of the guide box. Fig. 6 is a.plan view of the swivel base on the line :c-w of Fig. 5.

Referring to the drawings: A indicates a base plate adapted to besecured in any suitable manner to. a workbench or like support. Turnablymounted upon the base plate is a swivel base 2, and formed on the lowerportion or edge of same is a pair of projecting flanges 3, which are soposltioned as to be engaged by a pair of retaining guide lugs 4 formedon the main base plate A; the space 5 between the projecting flanges 3is just sufficient to'permit the swivel base to be dropped betweenretaining lugs 4", be-

fore turning same into the interlocked position shown in Fig. 6.

Secured upon the swivel base 2', ma concentric position with relation tosame, is a drum 6 provided with a pair of annular flanges 7 and 8 whichproject out a sufiicient distance fromthe face of the drum to formbearings .for a pair of turnable rings9 and 10, and a pair of turnableguide rings 11 and 12. The main bearing drum 6, upon which the severalrings just mentioned are supported, is secured to the swivel base 2 by aclamping plate, 13 and screws 14.- which secure the clamping plate anddrum with relation to the swivel base 2. The clamping plate 13 isprovided with an annular outwardly projecting flange 15 which retainsthe rings 9 and 11 in position upon the annular flange 7 the lower rings10 and 12: are slnnlarly secured in position by the annular flange 8,while the swivel base 2 acts asa bearing for the two lower rings.

Suitably secured to the rings 9 and 10,

or formed integral with same, isza pair of beveled gear segments 9 and10, and turnablymounted upon a-stud shaft 16 secured in the drum 6 isabeveled pinion 17, which is so positioned as to intermesh with theupper and lower gear segments 9 and 10'-.

Any turning movement exerted upon one ring or another will thusbeequally and simultaneously transmitted to the opposite ring, causingthese to move in unison but in opposite directions. i v i 18 and 19indicate the main horizontally positioned supporting plates of themiterbox, upon which are carried vertical guide plates 20 and 21. Theguide plates20 and 21 are here shown as detachably mounted,

said detachable mounting being secured by providing outwardly projectinglugs 22 and 23 on the upper and lower plates, .respec-- tively, throughwhicha taper pin 24 may be passed to temporarily secure the platestogether. One of thehorizontal plates, as 18, is secured to the upper.turnable ring 9, as at 25,"and to the lower guide ring, at 26, througha supporting bracket 27 which is secured to the outer end ofthe plate 18at 28; further connection being provided by the screw 29. The plate 18,being secured to the rings 9 and 12, will thus always move in unisonwith same, while the opposite plate 19, which is secured to the upperguide ring 11, as at 30, and to the lower ring 10, as at 31, through'themedium of a bracket 32 and a screw 33, will naturally move in unisonwith these rings, opposite movement of one plate with relation to theother being secured by providing gear segments 9 and 10 and intermediateinterlocking pinning 17. It can thus be seen that the movement of oneplate will always be transmitted to the opposite plate as the spacing ofthe teeth, and the pitch line of same is constant, a uniform movement ofthe plates'in relation to each other will thus always be secured.

For the purpose of quickly locking the plates 18 and 19 the moment thedesired cutting angle has been secured, the following locking mechanismhas been provided: Referringto Figs. 1 and 4, 34 indicates abrakeshoepivotally mounted upon the lower side of the plate 19, as at 35.Turnably mounted upon a pin 36, also secured to the lower side of theplate 19, is an eccentric member 37 provided with an outwardly extendingthumb projection 38. The operation of the locking mechanism isaccomplished by swinging the eccentric in the direction 0pposite to thatof arrow 0:, the eccentric is thus turned in a position where it willengage with the outer end of the brakeshoe 34 and cause this to bearagainst the rings 9 and 11 with sufficient force to lock these withrelation to the plate 19. The locking of the two rings 9 and 11 withrelation to each other consequently prevents any movement of the rings10- and 12. The plates 18 and 19 are thus simultaneously looked throughthe medium of the rings 9 and 11, and this may be quickly accomplishedregardless of the position of the plates 18 and 19, as it only becomesnecessary to, swing the eccentric about its pivot 36.

Projecting through a slot 39-, formed in the swiveled base 2, is ahorizontally disposed bar40, upon the outer endsof which are slidablymounted a pair of blocks 40. Secured in the blocks 40 is a pair ofvertically disposed guide. rods 4142, and slidably mounted upon thevertically disposed rods 4142 are saw guide frames 43, through which thesaw may be inserted and guided while cutting the moldings or similarobjects within the miter-box.

It will be understood that each end of the bar 40- is provided withblocks 40 and upwardly extending rods 41 and 42 upon which are slidablymounted the guide frames 43, and that the saw may-be inserted throughsame to keep this in perfect alinement with relation to the center ofthe miter-box. Set screws 44 have been provided, as indicated in Fig. 6,for the purpose of keeping the guide frames in perfect alinement withrelation to the center of miter-box. Both of the vertically disposedrods 41 are slightly indented or notched, as indicated at 45, to permita spring-actuated latch 46 to snap into this depression and retain thesaw in an elevated position with relation tothe miterbox when not inoperation.

Very slight- 1 pressure is, however, sufficient to depress the frames 43into operative position with relation to the molding or other materialplaced within the box.

Referring to the perspective view, Fig. 2, it will be seen that theguide ring 12 has formed on one side a lateral projection 12. This isprovided for the purpose of permitting the bracket 27 to be secured tosame. The upper guide ring 11 is provided with a similar extension 11 towhich the angular plate 19 is secured.

The miter-box constructed as here shown is simple in construction,-reliable in action and may be quickly dismantled for packing or shippingpurposes when so desired. The plates 18 and 19. may be quickly removedby simply unscrewing the screws 29 and 3.3. This permits the plates 18:and 19, with connected brackets 27 and 32, to. be released with relationto the different rings. The bar 40, together with the upright rods41.-42 and saw guide frames 43, may be also. quickly removed by simplyslackening up the set screws 44. The different extensions, such astheplates 18 and 19 and guide frames-43 may thus be quickly removed, orassembled, as the case may be, without disturbing the main lockingmechanism and gearing mounted on the base A. Similarly by providing theswivel base 2, it becomes possible to swing the miter-box into the mostconvenient position with relation to. its support and the operator.Furthermore, a much truer cut may be obtained when using a swivel base,as any wabblingof the saw blade will be transmitted to the swivel base,thus perm-itting a straight movement of the saw between the guide frames43-.

The materials and finish of the several parts of the miter-box are suchas experience and judgment of the manufacturer may dietate.

The upper surface of the clamping plate may he graduated, as at 48, thuspermitting the operator to set the supporting plates at any desiredangle.

Having thus described my invention what I claim and desire to secure byLetters Patent, is

1. The combination in a miter-box of a swivel base, a bearing drumsecured to the swivel base, a, pair of upper and lower rings turnablymounted on said drum, supporting plates secured to said rings, means fortransmitting uniform movement from one plate to another, and abrake-shoe directly engagea-ble with the rings to lock the rings andplates against movement.

' 2. In a miter-box, the combination of a swivel base, a bearin drum onsaid base, a pair of'support' g p ates turnabl'y mounted on the drum,segmental rack sections on said plates, a pinion journaled on the drumintermeshing with said rack sections, an anring, a guide ring mounted onthe drum and below the lower rack-carrying ring, a supporting platesecured to the upper rackcarrying ring, a bracket connecting said platewith the lower guide ring, a supporting plate secured to the upper guidering, a

bracket connecting said plate wlth the lower rack-carrying ring, apinion journaled on the drum intermeshing with the racks, a brake-shoeengageable with the outer face of the upper rack-carrying ring and guidering, and means for operating said brakes 0e.

4:. The combination in a miter-box of a swivel base, a bearing drumsecured to the swivel base, a pair of upper and lower rings turnablymounted on said drum, supporting plates secured to said rings, and abrakeshoe engageable directly with the rings to lock the rings andplates against movement.

5. In a miter box, a, swivel base, a drum on said base having an upperflange and a lower flange, a lower guide ring on the base and a lowertoothed ring superimposed on the guide ring and arranged between saidbase and lower flange, an upper toothed ring and an upper guide ringsuperimposed thereon and arranged on said upper flange,

a pinionmeshing with each of the toothed rings, a horizontal plateconnected to the upper toothed ring, means to connect said plate to thelower guide ring, a second hori zontal plate connected to the upperguide ring, and means connecting the second horizontal plate to thelower guide ring.

6. In a miter boX, a central drum, means for rotatably mounting thedrum, a pair of horizontal plates, means connected to each plate androtatably disposed over the drum for independently mounting each plateon said drum, means to drive said plate mounting means in unison, anannular friction face on one of the plate mounting means, and brakemechanism for engagement with said friction face.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WILLIAM E. KAWALLE.

JOHN H. HERRING, W. W. HEALEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. O.

